Calculator Inputs
Example Data Table
| Source | Activity Data | Factor / GWP | Calculation | Result |
|---|---|---|---|---|
| Diesel | 2,500 liters | 2.68 kg CO₂e/liter | 2,500 × 2.68 | 6.70 tCO₂e |
| Natural gas | 4,000 m³ | 1.90 kg CO₂e/m³ | 4,000 × 1.90 | 7.60 tCO₂e |
| Refrigerant | 8 kg | 1,430 GWP | 8 × 1,430 | 11.44 tCO₂e |
| Owned fleet | 12,000 km | 0.00021 t CO₂e/km | 12,000 × 0.00021 | 2.52 tCO₂e |
Formula Used
Fuel combustion emissions: Emissions = Activity data × Emission factor
Fleet emissions: Emissions = Distance traveled × Vehicle factor
Fugitive refrigerant emissions: Emissions = Refrigerant leaked × GWP
Process gas emissions: Emissions = Gas mass emitted × GWP
Total scope one emissions: Total = Fuel + Fleet + Fugitive + Process emissions
Intensity per unit: Total tCO₂e ÷ Production units
Intensity per hour: Total tCO₂e ÷ Operating hours
Estimated carbon cost: Total tCO₂e × Carbon cost per tonne
How to Use This Calculator
- Enter fuel consumption from onsite combustion sources.
- Insert matching emission factors for your reporting standard.
- Add owned fleet distance and fleet factor if applicable.
- Enter refrigerant leakage and its GWP value.
- Add process gas emissions from manufacturing operations.
- Optionally enter production units and operating hours.
- Press Calculate Emissions to view totals above the form.
- Review the graph, intensity metrics, and download outputs.
Frequently Asked Questions
1. What are scope one emissions?
Scope one emissions are direct greenhouse gas releases from sources your company owns or controls, such as boilers, furnaces, fleet vehicles, refrigerants, and manufacturing process gases.
2. Why are refrigerants included?
Refrigerants can have very high global warming potentials. Even small leaks from chillers, cooling systems, or industrial equipment can materially increase direct emissions totals.
3. Can I change the emission factors?
Yes. The calculator includes editable example factors. Replace them with values from your local inventory, national guidance, or chosen reporting framework for better accuracy.
4. Does this calculator handle scope two emissions?
No. This page focuses only on direct operational emissions. Purchased electricity, heat, steam, or cooling should be assessed separately under scope two.
5. What unit is the final answer shown in?
The final total is displayed in tonnes of carbon dioxide equivalent, written as tCO₂e. Individual source contributions are also summarized in the same unit.
6. How do I use production output intensity?
Production intensity helps compare emissions efficiency across months, plants, or product lines. Divide total direct emissions by units produced to track operational improvement.
7. Is this useful for manufacturing sites only?
It is designed for manufacturing, but it also works for warehouses, workshops, utilities, and industrial facilities that need direct emissions tracking.
8. Why add a carbon cost field?
A carbon cost helps estimate exposure under internal shadow pricing, emissions fees, or future regulation. It turns emissions totals into a financial planning signal.